![]() I attempted to add the options tun-mtu 1400 and mssfix to the openvpn client config file on my server VM, but the openvpn then refuse to connect. I need a solution that does not require modifying the vpn connection of the host, everything must be done within virtualbox and the VMs. I researched this problem, and I found there was issue with mtu timings, as the my host machine is already connected to a VPN, and the server VM is also connected to another VM, which add padding and can create fragmentation and performance issues. ![]() I can get my clients to communicate with the server over the internal network and access the internet through the openvpn tunnel configured on the server, but the clients experience severe connection and performance issues on the internet, while the server itself does not have issues with internet access through the vpn. ![]() So far this has been successful partially. Dnsmasq is running over eth1 to serve ips to the clients, and iptables is configured to forward all the traffic from eth1 to tun0 which is the openvpn tun adapter on the server. This VM also has an eth1 interface, which is connected to a Virtualbox internal network used by the other VM clients to connect to the internet. The server VM is connected with eth0 as NAT to access the internet connection. My setup consists of 1 VM running Ubuntu Server, and multiple client VMs that connect to it to access the openvpn connection the server VM has. ![]() 802.1q (2) atftpd (1) bandwidth performance (1) Bit Allocation (2) bridge-utils (1) cisco 3550 (2) cisco systems (4) class-map (1) conky (1) Copper Loop Qualification (2) crosstalk interference (2) DELT (2) dmidecode (1) DMT tool (1) DSL (2) Dynamic Port Forwarding (1) Dynamips (3) error 206-unable to create (3) ethtool (1) GNS3 (9) HLIN (1) HLOG (1) HUAWEI E220 (1) IEEE 802.I am trying to set up an internal network in Virtualbox in order to share an openvpn client tunnel with multiple VMs acting as clients that should be completely isolated from everything except for the VPN tunnel interface, so as to prevent all possibilities of the client VMs from revealing my real ip address. ![]()
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